what happened ? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-22-2007, 12:55 AM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2007
Location: albanel, canada, quebec
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
fredericGTP is on a distinguished road
Default what happened ?

Well, i bought a 94 bonneville and i remplace the tranny. everything is good but when i start it, it run about 1200 rpm'* and more he heated, more the rpm'* go up... hot he run about 1800 rpm'*. the IAC is nice, the tps voltage too... i think than i see 2 possible problems; vac leak or pcm problem... someone have an idea?

Thx Fred
fredericGTP is offline   Reply With Quote
Old 08-22-2007, 08:13 AM   #2
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

Vacuum modulator or the line to it leaking?
bill buttermore is offline   Reply With Quote
Old 08-22-2007, 08:39 AM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Welcome to the world of the 94.

I agree 100% with your diagnosis of vacuum or PCM. Let'* start off on the easier of the two and check for vacuum leaks. Most likely your lines are original and leaking badly. Also.. consider cleaning the TB in case the throttle plate is sticking open.

After we rule out a few more things..we'll know it'* probably a flukey pcm.
BillBoost37 is offline   Reply With Quote
Old 08-22-2007, 09:34 AM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

What did you replace the trans with? New, rebuilt, or used?
willwren is offline   Reply With Quote
Old 08-22-2007, 09:37 AM   #5
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Quote:
Originally Posted by willwren
What did you replace the trans with? New, rebuilt, or used?
Good thought...but that shouldn't impact the idle speed.
BillBoost37 is offline   Reply With Quote
Old 08-22-2007, 01:37 PM   #6
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2007
Location: albanel, canada, quebec
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
fredericGTP is on a distinguished road
Default

Quote:
Originally Posted by willwren
What did you replace the trans with? New, rebuilt, or used?
a used one
fredericGTP is offline   Reply With Quote
Old 08-22-2007, 01:40 PM   #7
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2007
Location: albanel, canada, quebec
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
fredericGTP is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37
Welcome to the world of the 94.

I agree 100% with your diagnosis of vacuum or PCM. Let'* start off on the easier of the two and check for vacuum leaks. Most likely your lines are original and leaking badly. Also.. consider cleaning the TB in case the throttle plate is sticking open.

After we rule out a few more things..we'll know it'* probably a flukey pcm.
i checked for vac leaks, everything seem ok i'll clean the TB to be sure.. after i'll try another PCM. correct me if i'm in error, but 94'* bonneville is OBDII ??
fredericGTP is offline   Reply With Quote
Old 08-22-2007, 01:41 PM   #8
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Check the cruise cable from the TB down to the solenoid above the tranny; case. If it'* too tight, it'll hold the throttle open a bit.
J Wikoff is offline   Reply With Quote
Old 08-22-2007, 02:04 PM   #9
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

94 & 95 are OBD 1.5 hybrid years. They have an OBD2 connector..they are not full OBD2 though.

When you try swapping PCM'* make sure you change the eprom chip from your original to the new one.
BillBoost37 is offline   Reply With Quote
Old 08-22-2007, 06:16 PM   #10
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2007
Location: albanel, canada, quebec
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
fredericGTP is on a distinguished road
Default

guys, very cool to have so clear and fast reponses like this i'll check everything soon; i'll give you news !
fredericGTP is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Where were YOU when it happened? repinS Lounge 28 09-13-2003 01:24 AM
What just happened? (UPDATED -- IMPORTANT) ssesc93 Lounge 22 08-14-2003 01:00 AM
Real crazy $hit happened Jeep2Bonny 1992-1999 3 07-13-2003 08:00 PM
What happened? Teuobk Forum updates and suggestions 1 01-21-2003 02:27 AM
What happened to every one here? DeathRat Buick 12 10-19-2002 06:58 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:47 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.